Safety net

History and undoing a run

Every original is backed up, so a run you are unhappy with can be reverted.

Every run is listed under History, newest first, with what it covered, how many images were changed, how many were skipped, and when it finished.

Restoring

Open History and find the run.
Press Restore to put every image in that run back the way it was.
Or open the run to see each image, with its real before and after, and restore a single image on its own.

A restore runs in the background in the same way a resize does. Miko puts the original back and removes the resized copy.

Originals are kept for 30 days: after that they are removed and the run is marked as expired in History, so you always know what can still be undone. If a set of photos matters to you long-term, keep your own copies as well.